Short-flow rolling preparation process of high-strength and high-plasticity AlN/AZ91D magnesium base composite material plate

Abstract

The invention relates to a short-flow rolling preparation process of a high-strength and high-plasticity AlN / AZ91D magnesium base composite material plate; solid solution and water quenching processesof a cast ingot before rolling are formulated; subsequent rolling and annealing processes are optimized; and a set of cold rolling process for preparing a high-strength and high-plasticity magnesiumbase composite material rolled plate is provided. The cold rolling process is high in reduction in pass, few in annealing times among passes and short in annealing time, and can realize industrial short-flow preparation. In particular, through the patent technology, namely the optimal ratio of solid solution process parameters to water quenching process parameters to rolling process parameters toannealing process parameters, the edge cracking problem in the cold rolling process is solved when the high-strength and high-plasticity cold-rolled plate is obtained, and finally, the high-quality and high-performance magnesium alloy composite material cold-rolled plate can be obtained with high efficiency.

Description

technical field [0001] The invention belongs to the AlN / AZ91D magnesium-based composite material rolling process, and relates to a short-flow rolling preparation process for a high-strength and high-plasticity AlN / AZ91D magnesium-based composite material plate, aiming at in-situ particle strengthening AlN / AZ91D magnesium-based composite material (patent 201510882938.5), using a series of optimized solution treatment and rolling processes, a rolling process for the preparation of high-strength and high-plasticity magnesium-based composite sheets is proposed, which can further improve the mechanical properties of AlN / AZ91D magnesium-based composites. Background technique [0002] The close-packed hexagonal crystal structure of magnesium and magnesium alloys determines their low plasticity and poor room temperature deformation ability, which seriously restricts the industrial application of magnesium alloys. In the cold rolling process of magnesium alloy sheets, serious edge cr...

AI Technical Summary

Problems solved by technology

Even though AZ31, the most widely used wrought magnesium alloy in the industry, has high plasticity, it does not have high strength; other high-strength magnesium alloy materials obtained by alloying, due to their inherent low plasticity, are also in the process of cold rolling. It is difficult to obtain a plate with high strength, high plasticity and low edge cracking tendency; traditional particle-reinforced magnesium-based composites have problems such as uneven distribution of particle-reinforced phases and weak bonding between particles and the matrix interface during the preparation process. However, it has low plasticity and extremely poor room temperature deformation ability. Therefore, there is no magnesium-based composite material that has been applied to the preparation of cold-rolled sheets.

Images